Fixed the engine version since we now build beta2 instead of HEAD (Make Building the SDK great again!)

build.gradle

@@ -32,7 +32,7 @@ if (System.getenv('TRAVIS') != null) {
         ext.jmeEngineVersion = "3.1.0-beta2" // Use Beta 2 instead of 3.1.0-master-SNAPSHOT
     }
 } else {
-    ext.jmeEngineVersion = "3.1.0-SNAPSHOT" // Might also need a change to 3.1.0-beta2, if you get "could not find dependency" errors.
+    ext.jmeEngineVersion = "3.1.0-beta2" // In case you build of the HEAD of 3.1, you need to change that to 3.1.0-SNAPSHOT again
 }
 
 configurations {